Bull bar



FIG. 1 is a top, front, and left side perspective view of a bull bar showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is a left side elevation view thereof. 

CLAIM The ornamental design for a bull bar, as shown and described. 